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LiquidPiston unveils 70cc rotary gasoline engine prototype embodying HEHC; power dense, low-vibration

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The X Mini 70cc rotary gasoline engine. As the engine does not have poppet valves and the gas is fully expanded before the exhaust stroke starts, the engine also has potential to be quiet. Click to enlarge. The rotary engine architecture shows a potential indicated efficiency of 60% and brake efficiency of >50%. —Shkolnik et al.

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International automotive researchers emphasize the importance of continued development of the internal combustion engine

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A transition from the gasoline or diesel ICE to a full gasoline/diesel hybrid can significantly reduce emissions. This could be paired with combustion technologies with highly diluted combustion (stoichiometric with exhaust gas recirculation (EGR) as well as lean burn with excess-air ratios above 2). Gas exchange.

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Small-displacement two-stroke H2 engine could address performance and emissions cost-effectively for recreational market; potential for Asian motor vehicle fleet

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Comparison of brake thermal efficiency and specific fuel consumption at rated power (ICOMIA Mode 5), hydrogen vs. gasoline engines. Such an engine could provide a cost-effective solution for small recreational vehicle- and motorcycle applications. Oh and Plante. Click to enlarge. —Oh and Plante.

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GM RD Develops and Demonstrates Strontium-Doped Perovskite Catalysts Rivaling Platinum Catalysts for NOx Control in Diesel Exhaust; Lower Cost Could Be a Boost for Diesel

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Because NO 2 constitutes less than 10% of NO x in the diesel engine-out exhaust, an oxidation catalyst is required to increase the NO 2 fraction. Platinum has been found to be especially active for NO oxidation; thus, Pt-based diesel oxidation (DOC) and LNT catalysts have been widely used for diesel exhaust aftertreatment. Science Vol.

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DOE issues $10M incubator FOA for batteries, power electronics, engines, materials, fuels and lubricants

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year plans and roadmaps, with a concomitant focus of the majority of its resources on a limited number of “highest probability of success” pathways/approaches to ensure that the program initiatives are supported at a critical mass (both in terms of dollars and time) for maximum impact. burn and exhaust gas recirculation (EGR)?diluted

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GM Developing New Concept for Emission Control for Lean-burn SIDI Engines: Passive Ammonia SCR

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Engineers at GM’s R&D Center are developing a new low-cost concept for NO x control from lean-burn spark ignition direct injection (SIDI) engines: passive ammonia SCR. gasoline) engines, with a higher charge mass and higher temperature spread, can deliver improved thermal efficiency and better fuel economy. Lean-burn (i.e.,

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New $30M ARPA-E program to produce renewable liquid fuels from renewable energy, air and water

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By transforming renewable resources into liquid fuels, renewable power can be stored for longer periods and transported efficiently and inexpensively as liquids via existing infrastructure to consumers. Comparative costs of current different energy delivery options for transportation. Fuel cost $/kg. H 2 via SMR. Electricity.

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